Rotary scraper



0.53. joLBEnG. ROTARY SCRAPER. APPLICATION FILED NCIV. 2B. I9I9.

1,429,089. Patentedsept; 12,1922.

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ROTARYSCRAPER.

APPLlcAuoN FILED Nov. 2s. 19.19.

1,429,089, Patenteasept. 12,1922.

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MMQMW atented Sept. 192.

ACHARLES n. omsnne, or ALHAMBRA, CALIFORNIA, assieme or ONE-nm To FRANCIS R. SC-BJANCK, 0F CHICAGO, ILLINOIS.

Romair scannen.

Application led November 28, 1919.` Serial No. 841,255.

'in the position of the bowl of the scraper for making the latter operate. This vchange of position will make possible the yretention of saturated or loose excavated material, which would .not remain in a scraper bowl which retains t-he positionused for lilling when being transported.

Another object is the provision of a scraper bowl mounted for rotary movement and having means for locking the scraper bowl against said rotary movement, and to lock it in different predetermined positions in ord-er to accomplish various kinds of filling, grading, leveling and excavation.

A further object is the provision -of=fa scraper bowl mounted for rotary movements wlth draft means connected 1n such a manner that by changing the height at whichY l pull will be applied to the scraper, rotary movements will be given such scraper.

A still further-object is the provision of a rotary scraper having draft means applied thereto and manual means for rotating the bowl of the scraper. v Other objects will appear hereinafter.

An embodiment of my invention is shown in the accompanying drawings, forming a part of this specification, and in which- Fig. 1 is a plan view ofl a scraper embodymy invention;

ig. 2 'is an end elevation of the same; Figs. 3 and 4 are views similar to Fig. 2, but showing certain of the portions broken away and other portions in different positions; v s Fi 5 is an enlarged fragmental section showing internal parts;

Fig. 6 is a front viewy of a lever or Johnson bar used in the construction; and

Fig. 7 is a side view of the lever shown in Fig. v6. l Referring more particularly to thedraw- .pivoted as at 31.

ings, I have indicated ascraper bowl madev up of sheet metal with reinforcing bars. Said bowl 10 preferably comprises end porl tions l1 with a bottom wall secured thereto 1n any desirable manner.' The bottom wall has a plane portion k12 with its frontedge` sharpened as at 13 to provide a cutting edge for thescraper. This edge may be provided with a special cutting bar when so desired.

Just back ofthe plane part 12 of the bottom of the bowl is a curved" partV 14 having its center substantially at a point 15 which is not at the center of rotation of the scraper.

Immediately back of the curved portion 14 is a substantially plane portion 16, and back of this plane portion 16 isla curved portion 17 having'its center substantially at a point 18. At the ends of the bowl are provided substantially circular runners 19 having their centers subst-antially at the center of rotation or pivot point. The runners may be mounted and secured to the ends of the bowl in any desirable manner. I have indicated bars 20 as being pivoted on pins 21 at point 18 and secured to-the runners by rivets. The pins or bolts 21 maybe secured in any desirable manner, such as indicated.

in Fig. 5.

Pivoted on bolts 21 are the end a bail' 22. The bail 22 may be ma e up of any suitable form of bars to make a rigid corlistruction, that indicated being quite suit ab e. arms 23 which extend downwardl from the bolts 21 at any desired angle, andy have eyes in their lower ends engaging draft bars 24. The draft bars 24 are connected to an evener- 25. The draft bars and evener may be of any preferred construction.

The bail 22 is provided with a lever 26 at its central portion which extends upwardly and rearwardl from bowl 10. Lever 26 is preferably hol ow and has al rod 27 extendlng therethrough. A thumb lever 28 is piv-4 oted as at 29 to the lever 26 and connected with the rod 27 for moving the latter longitudinally of the lever 26. At the lower end of rod 27 is connected a lever 30 which is The other end ofl lever 30 is connected to a bolt 32 which is slidably arts of' On the end parts of the bail 22 are.l

mounted in suitable bearings 33 in the bail i ,22.7 A spring 34 is associated with the bolt understood that two sets of members 30, 31,v

32, 33, 34 and 35 may be provided when so desired, one set vonly being shown, When two sets are provided both runnerswill be locked, while the parts shown in Fig. 5 indicate one runner as being capable of being locked. lin Fig. 1 notches 35 are shown in both runners. v

On one of the pins 21, between one end portion of the bail 22 and one of the bars 20, is pivoted a Johnson bar or lever 36. rlhis lever has a rod 37 mounted therein and operated by a thumb lever 38 similar to the means for operating rod 27 already described. The rod 37 is provided with a spring 39 which normally holds the lower end thereof out of engagement with the notches- 35. A. portion of the bail 22 adjacent the lever 36 is provided with a projection 40 for limiting the movement of Johnson bar or lever 36 forwardly. The oscillatory movement of said lever is limited in the other direction by engagement with the bail, see Fig. 2.

ltn operating the rotary scraper any suitable means for applying a pull to the draft bar 25 may be applied. The lever 26 may be moved on the axis of the 'pins 21 so as to move the arm 23 to such a height as to cause the cutting edge 13 of the plate 12 to cut into the material to be excavated. While the scraper is bein moved along rectilinear lines the bolt or p unger 32 engages one of the notches 35 so as toprevent rotation of the bowl in a clockwise direction as viewed in Fig. 2. During such operation the parts will come to such equilibrium as to retain the parts in proper relation during the scraping operation.

When the bowl is loaded the lever 36 is moved forward relatively to the lever 26 and the bail 22, and when in proper position relative to the bowl the lever 38 is pressed so as to force the plunger 37 into one of the notches" or retentions 35 and then the lever 36 is drawn back and downward so as to cause the bowl to turn over on the curved portion 14 between the plane portion 12 and the plane portion 16 until the bowl rests on the plane portion 16, as shown in Fig. 3. During this rearward rotation of the bowl the notches or retentions 35 on 'account of the inclined surfaces shown in Fig. 3, will permit the bolt 32 to snap from one notch to the next while the bail .22 and lever 26 retain substantially the `same position relative to the draft bar 24 and the surface over which the bowl is being moved. llt will thus be seen that themovement of the bowl to the position shown in Fig. 3 may be effected without stopping movement of the bowl along the ground. When the bowl with its load reaches the place for dumping, the pawl 32 is released by grasping the'lever 28 whereupon continued pull on the draft Meaeee bar 24 will move the lever 26 to a lower posi-1 be free to rotate in a clockwise direction to the position shown in Fig. 4. When the point of pull is raised by the lowering of the lever 26, such a relation of -parts is efn fected as to cause continued pull to rotate the bowl from the position shown in lFig. 3 to the position shown in Fig; 4 and thereby the material is dumped at the desired position on the ground. rlhis operation is particularly desirable when it is desired to build a` dike, border or other construction requiring that the earth be deposited in a compact mass, the latter being accomplished by allowing the bowl to rotate freely By means of such operation the material will not be scattered by a dragging scraper as is ordinarily the case, but will be deposited in a neat ridge.

However, the construction is also adapted to operate as a spreader. rllhat is to. say, the construction is 'such that the material may be unloaded and spread at varying depths. lVhile the notches 35 are such as to permit free rotation anti-clockwise of the bowl under the plunger' 32, rotation of the bowl in a clockwise direction will be prevented as soon as the lever\28 is released.

Therefore, after the bolt 32 is released and Y the pull on the draft bar 24 continues, the rotation of the bowl may be stopped as soon as the edge 13 is at the desired short distance above the ground. The thickness of the material being spread over the ground may be regulated by means of the lever 36. For instance, if the spreading is too thick, the lever 38 may be grasped to cause the plunger 37 to engage one of the notches 35 and then the bowl may be rotated anticlockwise, as viewed in Fig. 4, without inH terferring with the draft mechanism. because, as explained before, when the bowl is rotated anti-clockwise, the notches 19 will slip under the bolt 32. ln any event the lever 36 may be used to rotate the bowl in either direction, but its principal function is to rotate it anti-clockwiselVhen'ever it is desired to rotate the bowl in a clock wise direction the pawl 32 is released and the draft on the draft bar 24 permitted to continue to act so that the bowl will rotate freely on its axis in a clockwise direction.

It will thus be seen that the bowl may be rotated manually' by grasping the lever 38 and pushing the lever 36 forwardly or downwardly. `When the bowl is to be rotated automatically, due to the draft on the draft bar 24, the bolt 32 is released byl grasping the lever 28 at which time the bowl is free to rotate by means of its runners on the axis 21. However, there need be no discontinuance of the draft on 'the draft bar 24, nor of movement of the bowl along the ground. During such continuous movement, the scraping op# eration may be carried on until a certain amount of material has been scooped up; whereupon the lever 36 may move forwardly as far as the lug 40 will permit so that the plunger 37 may engage the bowl, so that when the lever 36 is returned rearwardly,

v the -bowl will be rotated to the position shown in Fi 3 and then continuedv movement'of the raft bar 24l will causeI the bowl toslide over the ground so that the load may be carried to the desired position for unload- 'the unloading, the lever 36 may be used, and

when the bowl is to resume its initial posi-1 tion the pawl or plunger 32 may again be released so as to allow the bowl to rotate freely on its runners, and when the pos1t1on shown in Fig. 2 is reached, the pawl or plunger 32 .may again be allowed tosnap into onel of the notches 19 whereupon the operation may be reached withoutany discontinuance of forward movement of the draft bar 24.

It is importantI to note that when the scraper moves along the ound, during its various operations, partie larly when carrying the load while the parts are as shown 1n bowl-and lock the bailagainst pivotal movement. f

' 5. A scraper comprising a substantially semi-cylindrical bowl; draft means connected with the bowl; substantially at the axis of the latter; and means for changing the relation of 'the line of pull with the center of rotation of the bowl.

6. A scraper comprising a bowl; curved runners on the bowl; a bail pivoted to the bowl; draft means connected with the bail;

and a lock engaging the runners holding the f bowl against rotary movement and holding the bowl in the `predetermined'useful posiv tions. i 4 y v c 7. A scraper comprising a substantially semi-cylindrical bowl; curvedl runners 'on the bowl having retentions in edges thereof; a bail pivoted to the bowl l; draft means connected with the bail; and a lever on the bail having a portion normally engaging one of Fig. 3, the various parts will be maintained in proper equilibrium by the fact that the pawl or plunger 32 engages a notch 35 to prevent downward movement of the lever'26 relative to the bowl.

I claim:

l. A scraper comprising a bowl; a bail pivoted to the bowl; yarms on the bail extending downwardly below the pivot of the latter; and draft means attached to the low er ends of said arms.

A scraper comprising a bowl, a bail having end portions disposed on and pivotally connected to the ends of the bowl; and draft means connected to the end portions of the bail considerably lower ythan said pivotal connections thereof.

3. A scraper comprising a bowl; a bail having end portions disposed on and pivotally connected to the ends of the bowl; draft means connected to the end portions otal connections thereof; and means locking the bail against pivotal-movement on the bowl.

4. A scraper comprising a bowl; a bail pivoted to the bowl; arms on thebail extending from said pivotal point downwardly to near the bottom of the bowl; draft means connected to the lower ends of said arms; and a lock on the bail adapted to engage the said retentions and locking the bowl against rotary movementv onl its pivotal connection with the bail.

8. A scraper comprising :a substantially.

semi-,cylindrical bowl; draft means connected to said bowl .at the aXis of the latter; and means pivoted at thel axis of the bowl adapted to enga-ge the periphery of the latter and rotate said bowl about lits axis.'

9..A scraper comprising a bowl; Ipivot pins at the ends of the bowl; a bail pivoted on the pivot pins; draft means connected. with the bail at a point spaced from the pivot of the latter; and' a lever pivoted on i one ofthe pivotpins having means for association with the bowl for rotating thelatter on the pivot pins. Y

10. A scraper comprising a bowl; curved runners at the ends of the bowl; a bail pivoted tothe ends of the bowl; draft means connected with the bail; a lever on the bail havinw means adapted to engage the runners for locking the bowl against relative rotary movement with the bail; and a lever having means for engaging the bowl for rotating the latter with respect to the bail.

11. A scraper comprising a curved bowl; curved tracks at the ends of said bowl and' connecting the top and lower edges of said.

bowl, the periphery of said bowl and said tracks being substantially cylindrical about the axis of said bowl; pivot pins at the axis of said bowl; a bail pivoted on [said pins with portions extending forwardly and downwardly from said pivot'pins; draft means connected to the `forwardly and downwardly extending portions of said bail; and means for locking said bowl and tracks against rotation relative to the bail.

12. A scraper comprising a bowl; runners at the ends of the bowl havingnotches therein; pivot pins at the ends of the bowl; a bail pivoted to the pivot pins; a bolty mounted in the bail; a lever connected to the bail and operatively associated' with the bolt; a lever on the bail; means in the handle associated with the lever for moving the bolt into one of said notches; a lever pivoted to one of said pivot pins; and means on the lever for engaging one of said notches facilitating the rotation of said bowl on said pivot pins.

13.v A scraper comprising abowl; runners at the ends of the bowl; pivot pins at the ends ofthe bowl; a bail pivoted on said pivot pins; arms on the bail 4extending downwardly adjacent `the lower side of the portion of said bowl being concentric withthe axis thereof, a plane portion -at one edge of said concentric portion; a portion at one edge of said plane portion curved in cross-section and eccentric to the axis of the bowl, and a plane portion adjacent said eccentric portion; draft means connected with the bowl; and a bail associated with the draft means and bowl.

15. A scraper comprising a bowl having a substantially plane portion adjacent one longitudinal edge; a curved portion adjacent its other longitudinal edge; a plane portion adjacent said curved portion; and a curved portion between the two plane portions; the last-mentioned curved portion having a shorter radius than the first-mentioned curved portion of the bowl; and circular runners attached to the ends of the bowl, said runners being disposed substantially in circles about the axis of the firstmentioned curved portions of the bowl.

16. A scrapercomprising a bowl havingI a. substantially plane portion adjacent one longitudinal edge; a curved portion adjacent its other longitudinal edge; a plane portion adjacent saideurved portion; and a curved portion between the two plane portions; the last-mentioned curved portion having a shorter radius than the first-mentioned curved portion of the bowl; circular runners attached to the ends of the bowl; said runners being disposed substantially in circles about the axis of the first-mentioned curved portions of the bowl; a bail attachedto the end portions of the bowl at the axis of said runners; arms on the bail extending downwardly near the bottom of the bowl; draft bars connected to the lower ends of said arms; and means on the bail for locking the bowl and runners against rotary movement with respect tothe bail.

17. A scraper comprising a bowl; pivot pins at the ends of the bowl; a Abail pivoted on the pivot pins; draft means connected with the bail at points spaced from the pivot of the latter; and a lever pivoted on one of the pivot pins having means for connection with the bowl for rotating the latter on said pivot pins.

18. A scraper comprising a" bowl havinvl a predetermined axis of rotation; draft means connected with the bowl; and means for changing the relation of the line of pull of said draft means with respect to said axis of rotation by changing the application of the pull.

19. A scraper comprising a bowl having a predetermined axis of rotation; draft means connected withthe bowl; and means for adjusting the effective pull of the draft means around said axis.

20. A scraper comprising a bowl having a predetermined axis of rotation; draft connections attached to the. ends of the bowl; draft means connected to said connections at points spaced from said axis of rotation; 'and means f'or adjusting the points of connection between the draft means and draft connect-ions around said axis of rotation always in spaced relation from the latter.Y

In testimony whereof ll have signed m name to this specification' on this 26th day of November, A. D. 1919.

CHAR-LES R. DBERG. 

